Tokyo Gas Co. (TKGSY, 9531.TO) signed a contract to buy a 25% stake in Quicksilver’s shale-gas project in Texas for $485 million, the companies said Friday. The deal helps Quicksilver retire some of the $2 billion in debt that it, like other relatively small U.S. energy producers, accumulated to finance its shale-gas production business. Shares rose 22% to $2.75 premarket.

U.S. authorities are investigating whether a unit of Japanese electronics giant Panasonic paid bribes abroad to land business, according a report in The Wall Street Journal, citing company documents. The company also said Monday that the date for its delisting of its American depositary shares from the New York Stock Exchange is April 22. ADSs fell 5.2% to $6.95 premarket.

Electric-car maker Tesla said that sales of its Model S vehicle exceeded the target provided in the mid-February shareholder letter, with sales over 4,750 units versus the 4,500 units projected. As a result, Tesla said it is amending its first-quarter guidance to full profitability. Shares rose 12% to $42.37 premarket.